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Last modified by Xiaoling on 2023/07/18 10:12
From version 188.1
edited by Edwin Chen
on 2022/07/03 11:17
Change comment: There is no comment for this version
To version 175.1
edited by Bei Jinggeng
on 2022/06/23 11:40
Change comment: Uploaded new attachment "image-20220623113959-5.png", version {1}

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61 61  
62 62  
63 63  
64 +
64 64  == 1.3 Specification ==
65 65  
66 66  
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88 88  
89 89  
90 90  
92 +
91 91  = 2. Connect LHT65N to IoT Server =
92 92  
93 93  == 2.1 How does LHT65N work? ==
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492 492  
493 493  AT+EXT=6,timeout  (% _msthash="506085" _msttexthash="8782189" _mstvisible="3" style="color:red" %)Time to power this sensor, from 0 ~~ 65535ms
494 494  
495 -For example:
496 496  
497 -AT+EXT=6,1000 will power this sensor for 1000ms before sampling the ADC value.
498 498  
499 -
500 -Or use **downlink command A2** to set the same.
501 -
502 -The measuring range of the node is only about 0.1V to 1.1V The voltage resolution is about 0.24mv.
503 -
504 -When the measured output voltage of the sensor is not within the range of 0.1V and 1.1V, the output voltage terminal of the sensor shall be divided The example in the following figure is to reduce the output voltage of the sensor by three times If it is necessary to reduce more times, calculate according to the formula in the figure and connect the corresponding resistance in series.
505 -
506 -[[image:image-20220628150112-1.png||height="241" width="285"]]
507 -
508 -
509 -When ADC_IN1 pin is connected to GND or suspended, ADC value is 0
510 -
511 -[[image:image-20220628150714-4.png]]
512 -
513 -
514 -When the voltage collected by ADC_IN1 is less than the minimum range, the minimum range will be used as the output; Similarly, when the collected voltage is greater than the maximum range, the maximum range will be used as the output.
515 -
516 -1) The minimum range is about 0.1V. Each chip has internal calibration, so this value is close to 0.1V
517 -
518 -[[image:image-20220628151005-5.png]]
519 -
520 -
521 -2) The maximum range is about 1.1V. Each chip has internal calibration, so this value is close to 1.1v
522 -
523 -[[image:image-20220628151056-6.png]]
524 -
525 -
526 -3) Within range
527 -
528 -[[image:image-20220628151143-7.png]]
529 -
530 -
531 -
532 532  == 2.5 Show data on Datacake ==
533 533  
534 534  (((
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588 588  
589 589  There are two methods:
590 590  
591 -1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specifying time range.
592 -1. Set [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]], LHT65N will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N will store the sensor data, and it will send all messages after the network recovery.
558 +1. IoT Server sends a downlink LoRaWAN command to [[poll the value>>||anchor="H2.6.4Pollsensorvalue"]] for specify time range.
559 +1. Set [[PNACKMD=1>>||anchor="H4.13AutoSendNone-ACKmessages"]], LHT65N will wait for ACK for every uplink, when there is no LoRaWAN network, LHT65N will store the sensor data, and it will send all messages after network recover.
593 593  
594 -Below is the typical case for the auto-update datalog feature (Set PNACKMD=1)
595 595  
596 -[[image:image-20220703111700-2.png||height="381" width="1119"]]
597 597  
598 598  
599 599  === 2.6.2 Unix TimeStamp ===
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1067 1067  
1068 1068  [[image:image-20220619092222-1.png||height="182" width="188"]][[image:image-20220619092313-2.png||height="182" width="173"]]
1069 1069  
1070 -**1m long breakout cable for LHT65N. Features:**
1035 +1m long breakout cable for LHT65N
1071 1071  
1072 -* (((
1073 -Use for AT Command， works for both LHT52/LHT65N
1074 -)))
1075 -* (((
1076 -Update firmware for LHT65N, works for both LHT52/LHT65N
1077 -)))
1078 -* (((
1079 -Supports ADC mode to monitor external ADC
1080 -)))
1081 -* (((
1082 -Supports Interrupt mode
1083 -)))
1084 -* (((
1085 -Exposed All pins from the LHT65N Type-C connector.
1086 -)))
1087 -
1088 1088  [[image:image-20220619092421-3.png||height="371" width="529"]]
1089 1089  
1090 1090  
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1770 1770  Finally, unplug the DuPont cable on port4, and then use the DuPont cable to short circuit port3 and port1 to reset the device.
1771 1771  
1772 1772  
1773 -== 6.6 Using USB-TYPE-C to connect to the computer using the AT command ==
1774 1774  
1775 -[[image:image-20220623110706-1.png]]
1776 -
1777 -
1778 -[[image:image-20220623112117-4.png||height="459" width="343"]]
1779 -
1780 -(((
1781 -In PC, User needs to set serial tool(such as [[**putty**>>https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to (% style="color:green" %)**9600** (%%)to access to access serial console for LHT65N. The AT commands are disable by default and need to enter password (default:(% style="color:green" %)**123456**(% style="color:red" %))(%%) to active it. Timeout to input AT Command is 5 min, after 5-minute, user need to input password again. User can use AT+DISAT command to disable AT command before timeout.
1782 -)))
1783 -
1784 -
1785 -Input password and ATZ to activate LHT65N,As shown below:
1786 -
1787 -[[image:image-20220615154519-3.png||height="672" width="807"]]
1788 -
1789 -
1790 -== 6.7 How to use  USB-TYPE-C to connect PC to upgrade firmware? ==
1791 -
1792 -[[image:image-20220623110706-1.png]]
1793 -
1794 -(% style="color:blue" %)**Step1**(%%): Install TremoProgrammer  first.
1795 -
1796 -[[image:image-20220615170542-5.png]]
1797 -
1798 -
1799 -(% style="color:blue" %)**Step2**(%%)：wiring method.(% style="display:none" %)
1800 -
1801 -(% _msthash="506146" _msttexthash="52173160" %)
1802 -First connect the four lines；
1803 -
1804 -(% _msthash="506146" _msttexthash="52173160" %)
1805 -[[image:image-20220623113959-5.png||height="528" width="397"]]
1806 -
1807 -(% _msthash="506146" _msttexthash="52173160" %)
1808 -Press and hold the start key to restart and enter  (% _mstvisible="1" %)bootlaod(%%) mode.
1809 -
1810 -(% style="color:blue" %)**Step3：**(%%)Select the device port to be connected, baud rate and bin file to be downloaded.
1811 -
1812 -[[image:image-20220615171334-6.png]]
1813 -
1814 -
1815 -Click the (% style="color:blue" %)**start**(%%) button to start the firmware upgrade.
1816 -
1817 -
1818 -When this interface appears, it indicates that the download has been completed.
1819 -
1820 -[[image:image-20220620160723-8.png]]
1821 -
1822 -
1823 -Finally,restart reset device again
1824 -
1825 -
1826 1826  = 7. Order Info =
1827 1827  
1828 1828  
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